Actually said at some games I've played/ran:
"My elf likes to squish guts! Let's go and squish some guts!"
"If no one starts laughing at my jokes, I'm just going to leave".
"Do you have any monks?" (asking about pregens)
-no
"That's too bad. Monks rule!"
*sigh*
My favorite was this guy at a Con game that took *way* too literally a brief character history I had written up for his wizard. Essentially, the bio indicated that he had found himself naked in the forest, didn't know how he'd gotten there, and could speak abyssal and infernal fluently. It also indicated that he'd found his way to town, and equipped himself with meager positions by doing odd jobs.
But, the player must have thought he showed up in the forest naked *yesterday* because throughout the entire game he wandered around aimlessly as if it was all brand new to his character, even while the party was being attacked (on more than one occasion).
Well, I guess there wasn't any specific quote by the guy, other than, at the end of the game he said, "this is the coolest background history I've ever seen. Do you mind if I keep this character sheet?"